EP3165701B1 - Ventilation element for window with flap acting as chicane - Google Patents

Description

The present invention relates to windows and doors, hereinafter collectively referred to as window element. When subsequently speaking of a window element, so should always be meant either a window or a door.

• wobei das Belüftungselement eine Anzahl von hohlen Kästen aufweist,
• wobei der jeweilige hohle Kasten an einer Unterseite des Belüftungselements in der Nähe einer horizontal verlaufenden Kante des Belüftungselements eine jeweilige untere Ausnehmung aufweist und an einer an diese horizontal verlaufende Kante angrenzenden Seitenwand des hohlen Kastens eine jeweilige obere Ausnehmung aufweist,
• wobei im Inneren des jeweiligen hohlen Kastens an einem jeweiligen Anlenkpunkt eine jeweilige Klappe schwenkbar gelagert ist, so dass die jeweilige Klappe zwischen einer jeweiligen Öffnungsstellung und einer jeweiligen Schließstellung bewegbar ist.

In particular, the present invention is based on a ventilation element for installation in a window element,

• the ventilation element having a number of hollow boxes,
• wherein the respective hollow box has a respective lower recess on a lower side of the ventilation element near a horizontally extending edge of the ventilation element and has a respective upper recess on a side wall of the hollow box adjacent to this horizontally extending edge,
• wherein in the interior of the respective hollow box at a respective pivot point, a respective flap is pivotally mounted, so that the respective flap between a respective open position and a respective closed position is movable.

• wobei das Fensterelement einen Blendrahmen aufweist, mittels dessen das Fensterelement im Mauerwerk eines Gebäudes befestigbar ist,
• wobei das Fensterelement einen am Blendrahmen befestigten Flügelrahmen aufweist,
• wobei der Blendrahmen oder der Flügelrahmen einen Stufenfalz aufweist, an dem bei geschlossenem Fensterelement eine im jeweils anderen Rahmen angeordnete Dichtung anliegt,
• wobei der Stufenfalz in einem Abschnitt eine Falzausnehmung aufweist, in dem als Ersatz für den Stufenfalz ein Belüftungselement angeordnet ist,
• wobei die horizontal verlaufende Kante des Belüftungselements nicht an den den Stufenfalz aufweisenden Rahmen angrenzt.

Furthermore, the present invention is based on a window element,

• wherein the window element has a window frame, by means of which the window element can be fastened in the masonry of a building,
• wherein the window element has a frame attached to the frame,
• wherein the frame or the sash has a stepped rebate, against which a seal arranged in the other frame rests when the window element is closed,
• wherein the shiplap has a fold recess in a section in which a ventilation element is arranged as a replacement for the shiplap,
• wherein the horizontally extending edge of the venting element is not adjacent to the frame having the rabbet rabbet.

Such a ventilation element and provided with such a ventilation element window element are for example from the DE 102 40 290 B4 known. In the DE 102 40 290 B4 For example, the hollow box has an intermediate ceiling dividing the hollow box into a lower chamber and an upper chamber. The intermediate ceiling ensures that air flowing in via the lower recess into the hollow box is deflected in a zigzag shape before it can flow out of the hollow box via the upper recess. The articulation point of the flap is located in the region of that horizontally extending edge of the hollow box, which is diametrically opposite the already mentioned horizontal edge. By means of the flap, if appropriate, the ventilation duct between the false ceiling and the top of the hollow box is closed. The flap is actuated by the draft on the one hand and the force acting on a counterweight gravity on the other.

From the DE 20 2010 002 002 U1 is a ventilation element is known in which also the above features are realized. A respective length of the respective flap is greater than a respective upper distance of the respective pivot point from the edge of the respective upper recess farthest from the respective pivot point. However, the length is smaller than a respective lower distance of the respective articulation point from the edge of the respective lower recess furthest from the respective articulation point. The articulation point is located outside the region between the respective lower and the respective upper recess, which contains the horizontally extending edge. By means of Flap is covered in a too strong air flow, the upper recess.

From the DE 297 21 460 U1 a ventilation element for installation in a window element is known, wherein the ventilation element is designed as a hollow box which has a lower recess on a lower side near a horizontally extending edge and has an upper recess adjacent to an edge extending horizontally to this edge. In the DE 297 21 460 U1 the ventilation element has no flap. The air flow passing through the ventilation element of the DE 297 21 460 U1 flows, is therefore unregulated.

From the DE 297 17 061 U1 a ventilation element for installation in a window element is known, which is placed on a window frame of the window element. The venting element has a substantially U-shaped cross-section which is open at the bottom. In the interior of the ventilation element a flap is pivotally mounted at a point of articulation, so that the flap between an open position and a closed position is movable. The pivot point is located in the horizontal portion of the U-shaped cross section near the transition to the nearest leg of the U. In the horizontal portion of the U can be arranged on the bottom part and the ceiling part webs, which force a meandering course of the air flow.

The use of heat-insulating window elements with high joint tightness often - especially in autumn and in winter - causes mold to form in closed rooms, unless otherwise adequate ventilation of the rooms is ensured. In the prior art, therefore, various solutions are known to ensure forced ventilation. This always raises the problem that arise at higher pressure differences between the two sides of the window element, a high energy loss and subjectively perceived as unpleasant drafts.

By means of various solutions known from the prior art, the energy losses and drafts are limited. However, the solutions of the prior art are usually suitable only for window elements made of plastic. However, at least the solutions according to the above patent documents are also applicable to window elements made of wood.

The solution according to the DE 102 40 290 B4 is relatively complicated. The solution according to the DE 297 21 460 U1 is unregulated. The solution according to the DE 297 17 061 U1 Especially with already installed window elements can be realized only with considerable construction effort.

The object of the present invention is to provide a ventilation element for installation in a window element and a window element with such a ventilation element, which avoid these disadvantages. In particular, the ventilation element should be simple and reliable and can be used with window elements made of wood.

The object is achieved by a ventilation element with the features of claim 1. Advantageous embodiments of the ventilation element according to the invention are the subject of the dependent claims 2 to 8.

• dass der jeweilige Anlenkpunkt sich in dem Bereich zwischen der jeweiligen unteren und der jeweiligen oberen Ausnehmung befindet, der diese horizontal verlaufende Kante enthält, und
• dass eine jeweilige Länge der jeweiligen Klappe sowohl größer als ein jeweiliger unterer Abstand des jeweiligen Anlenkpunkts von dem vom jeweiligen Anlenkpunkt am weitesten entfernten Rand der jeweiligen unteren Ausnehmung als auch größer als ein jeweiliger oberer Abstand des jeweiligen Anlenkpunkts von dem vom jeweiligen Anlenkpunkt am weitesten entfernten Rand der jeweiligen oberen Ausnehmung ist, so dass die jeweilige Klappe erzwingt, dass über die jeweilige untere oder obere Ausnehmung in den jeweiligen hohlen Kasten einströmende Luft zickzackförmig umgelenkt wird, bevor sie über die jeweilige obere oder untere Ausnehmung aus dem jeweiligen hohlen Kasten ausströmen kann.

According to the invention, a ventilation element of the type mentioned is configured by

• that the respective pivot point is located in the region between the respective lower and the respective upper recess containing this horizontally extending edge, and
• a respective length of the respective flap is both greater than a respective lower distance of the respective pivot point from the edge of the respective lower recess farthest from the respective pivot point and greater than a respective upper distance of the respective pivot point from that of the respective pivot point farthest removed edge of the respective upper recess, so that the respective flap forces that inflowing air via the respective lower or upper recess in the respective hollow box zigzag is deflected before it can flow out of the respective hollow box via the respective upper or lower recess ,

The object is further achieved by a window element with the features of claim 9. Advantageous embodiments of the window element according to the invention are the subject of the dependent claims 10 and 11.

According to the invention, a window element of the type mentioned above is configured in that the ventilation element is designed as a ventilation element according to the invention.

The respective flap is acted upon by an air flow, which flows through the respective lower or upper recess in the respective hollow box and flows out through the respective upper or lower recess from the respective hollow box, with a pressure force which - based on the respective flap - is directed from the respective open position in the respective closed position. The transfer to the respective closed position takes place when this pressure force is large enough. In many cases, the respective flap is in the respective open position when it is pivoted as far as possible to the respective lower recess, and in the respective closed position, when it is pivoted as far as possible to the respective upper recess. In some cases, however, the reverse procedure is realized.

Preferably, the flap is mounted on the hollow box via respective bearing elements or a respective film hinge, which or a pivoting of the respective flap relative to the respective hollow box does not oppose the respective flap in a predetermined rest position restoring force. This embodiment is particularly easy to realize. If necessary, a restoring force can be realized, for example by an additionally installed respective spring element.

In a particularly preferred embodiment, the respective flap, when it is pivoted as far as possible to the respective lower and / or upper recess, with the side wall forms a different angle from 0 °, so that the respective flap in the absence of an air flow moving away from the sidewall due to its gravity. As a result, no spring device is required. The ventilation element is arranged in this case on an upper side or a lower side of the window element.

If a restoring force is desired, this can be effected by means of the already mentioned spring element. Alternatively, it is possible that the respective flap is connected to the respective hollow box via a respective connecting element, so that a pivoting of the respective flap relative to the respective hollow box causes an elastic deformation of the respective connecting element. The respective connection element may be an independent element of the ventilation element. Alternatively, the respective connecting element can be integrally connected to the respective flap.

Preferably, the respective flap then, when it is pivoted as far as possible to the respective lower recess, viewed from the respective pivot point to the underside inclined to. This ensures that condensate, which can form due to temperature differences, runs off the respective flap and drips (within the respective hollow box) on the bottom.

The ventilation element also has an upper side. Preferably, a respective inner height of the respective hollow box - ie a distance of the underside from the top - in the region of the horizontally extending edge maximum and further decreases the respective inner height with increasing distance from the side wall strictly monotonous. This configuration ensures that condensate, which forms within the respective hollow box on the bottom or dripping on the underside, runs on the bottom to the respective lower recess, so that they can escape from the respective hollow box there. In the installed state in the window element, this corresponds to the fact that the underside is inclined relative to the horizontal, so that the underside has its lowest point in the region of the respective lower recess.

Preferably, the respective pivot point is located on the side wall and is spaced from the horizontally extending edge. By this configuration, a particularly efficient deflection of the air flow can be effected. Furthermore, the overall flow resistance of the respective hollow box can be minimized.

In a further preferred embodiment of the ventilation element is provided that the respective flap is formed elastically at least in the region of their respective abutment point remote from the respective abutment edge. Alternatively or additionally, it is possible that a respective stop region of the respective hollow box, in which the respective flap bears in the closed position on the respective hollow box, is designed to be elastic. This causes on the one hand a solid seal of the respective flow channel in the closed position and prevents the other a rattling or the like. It is possible that the respective flap is elastic as a whole. Alternatively, it is possible that the respective flap is elastic only in the region of the respective stop edge. In particular, in the case of a fully elastic flap tolerances can be compensated by the respective flap when the ventilation element and thus the respective hollow box should forgive, for example due to temperature influences.

Preferably, respective spacers are provided, by means of which a pivoting of the respective flap is limited to the underside before the respective flap rests on the underside. This can be achieved in a simple manner that the respective flow channel remains open even at low pressure differences between the inside and outside of the window element. Preferably, the respective spacers and / or the respective flap are elastically formed in a respective contact area in which they touch. As a result, rattling noises can be avoided.

FIG 1

eine Fassade eines Gebäudes,

FIG 2

einen Schnitt längs einer Linie II-II durch das Fensterelement von FIG 1,

FIG 3

einen Schnitt längs einer Linie III-III durch das Fensterelement von FIG 1,

FIG 4

ein Belüftungselement in vergrößerter Darstellung und

FIG 5

ein Belüftungselement in perspektivischer Ansicht.

Further advantages and details will become apparent from the following description of exemplary embodiments in conjunction with the drawings. In schematic schematic representation:

FIG. 1

a facade of a building,

FIG. 2

a section along a line II-II through the window element of FIG. 1 .

FIG. 3

a section along a line III-III through the window element of FIG. 1 .

FIG. 4

a ventilation element in an enlarged view and

FIG. 5

a ventilation element in perspective view.

FIG. 1 shows a facade 1 of a building. In the facade 1, a window element 2 is attached. The window element 2 may for example consist of wood, aluminum or plastic. Plastic is the most common case. In the context of the present invention, however, the window element 2 is preferably made of wood. However, the present invention is not limited to window elements 2 made of wood.

The window element 2 has a frame 3, by means of which the window element 2 is fixed in the masonry of the building. The window element 2 further comprises a sash 4, which is fixed to the frame 3. As a rule, the window element 2 can be opened. In this case, the following statements always refer to the closed state of the window element 2. Alternatively, it is possible that the window element 2 can not be opened. In this case, the window element 2 is always closed. In this case, therefore, the following statements necessarily relate to the closed state of the window element 2.

FIG. 2 shows a section along a line II-II through the window element 2 of FIG. 1 , According to FIG. 2 the frame 3 has a stepped rebate 5. In this case, a seal 6 is arranged in the casement 4. However, it is also possible to realize the reverse embodiment, in which the casement 3 has the stepped rebate 5. In this case, the seal 6 is arranged in the frame 3. Regardless of whether the one or the other embodiment is realized, is located in the closed window element, the seal 6 as shown in FIG FIG. 2 on the shiplap 5 on. The shiplap 5 is preferably made of solid material, especially in a wooden window.

The stepped rebate 5 is (essentially) formed circumferentially. In a particular section 7 (see FIG. 1 ) has the shiplap 5, however, a Falzausnehmung. The Falzausnehmung may have been introduced, for example, by milling in the Stufenfalz 5. The length of section 7 may be determined as needed. For example, it may be 10 to 60 cm. In the section 7 is according to FIG. 3 as a substitute for the shiplap 5 a ventilation element 8 is arranged. As a rule, the section 7 is located at the top of the window element 2. As a result, the ventilation element 8 is normally arranged on the upper side of the window element 2. Alternatively, the ventilation element 8 may be arranged on the underside of the window element 2. The ventilation element 8 may for example be screwed to the frame 3. Alternatively, it may be glued to the frame 3, for example. Other types of attachment are possible.
The venting element 8, as shown in the FIG. 3 and 4 a number of hollow boxes on. Minimal is only a single hollow box available. In this case, the ventilation element 8 is identical to the hollow box. This embodiment will be explained below. In an embodiment in which the ventilation element 8 has a plurality of hollow boxes, will be discussed later. The ventilation element 8 has an edge 9. As a rule, the edge 9 runs horizontally. The edge 9 is not adjacent to the frame 3, 4 in the installed state of the ventilation element 8, which has the stepped fold 5. On the one hand, an underside 10 and, on the other hand, a side wall 11 of the ventilation element 8 adjoin this edge 9. As a rule, the side wall 11 extends vertically. The bottom 10 usually runs - completely or substantially - horizontally.

At the bottom 10, the hollow box has a recess 12, hereinafter referred to as the lower recess 12. Furthermore, the hollow box on the side wall 11 has a further recess 13, hereinafter referred to as the upper recess 13. Inside the hollow box, a flap 15 is pivotally mounted at a pivot point 14. How out the FIG. 3 and 4 is readily apparent, is the pivot point 14 in the region between the lower and the upper recess 12, 13, which contains the edge 9. The pivot point 14 is usually located on the side wall 11, and at a location where the pivot point 14 is spaced from the edge 9.

Due to the pivotable mounting in the articulation point 14, the flap 15 is movable between an open position and a closed position. In general, the flap 15 is in the open position when it is pivoted as far as possible to the lower recess 12. This position is in FIG. 4 drawn in solid lines. In this case, the flap 15 is in the closed position when it is pivoted as far as possible to the upper recess 13. This position is in FIG. 4 drawn in dashed lines. In connection with this embodiment, the invention will be explained below. However, it is alternatively also possible that the flap 15 is in the open position when it is pivoted as far as possible to the upper recess 13. In this case, the flap 15 is in the closed position when it is pivoted as far as possible to the lower recess 12. In both embodiments, the flap 15 causes a flow limitation.

A length l of the flap 15 is dimensioned such that the length l is greater than a distance au. The distance au is the distance of the articulation point 14 from that edge of the lower recess 12 which is furthest away from the articulation point 14. The length l of the flap 15 is further dimensioned such that the length l is greater than a distance ao. The distance ao is the distance of the pivot point 14 from that edge of the upper recess 13, which is farthest from the pivot point 14. The air flowing into the hollow box via the lower recess 12 is therefore deflected by the flap 15 in a zigzag shape before it can flow out of the hollow box via the upper recess 13. The corresponding Air flow is in FIG. 3 dashed lines. The same applies to the reverse airway. The flap 15 thus enforces the path of such air flow. Forcing the zigzag flow on the one hand provides a good soundproofing and on the other hand a good driving rain protection.

Due to the presence of the ventilation element 8, a volume flow between the outside and the inside of the window element 2 can thus be achieved without having to cut out or otherwise interrupt the seal 6. The seal 6 rather remains intact. It is also possible that an inner seal and / or an outer seal are present between the frame 3 and the casement 4 in at least one further sealing plane. If this is the case, the inner seal or the outer seal are removed in a certain section. The section may correspond to section 7. If the inner seal and / or the outer seal are not present, an approximately remaining gap between the frame 3 and casement 4 may possibly be slightly widened, for example, to approximately 2 mm.

As already mentioned, the flap 15 can be connected to the hollow box 8 'via a connecting element, wherein the connecting element is elastically deformable. In this case, a pivoting of the flap 15 relative to the hollow box 8 'causes an elastic deformation of the connecting element and thus a restoring force, with which the flap 15 is acted upon by a rest position. As a rule, in this case the rest position is identical to the open position. In the simplest case, however, the flap 15 is mounted on the hollow box via bearing elements or a film hinge. Bearing elements or a film hinge set a pivoting of the flap 15 relative to the hollow box against the flap 15 in a predetermined rest position restoring force. In this case, when it is pivoted as far as possible onto the upper recess 13, the flap 15 forms with the vertical (ie as a rule also with the side wall 11) an angle α. This ensures that the flap 15 moves in the absence of air flow due to their gravity away from the side wall 11, ie in particular goes over again by itself in the open position. The angle α can be selected as needed. The decisive factor is that it is sufficiently different from 0 °. For example, the angle α can be between 5 ° and 10 °. Even larger values are possible. In an analogous manner, it is possible (alternatively or additionally) for the flap 15 to form such an angle with the vertical (and thus, as a rule, also with the side wall 11).

When the flap 15 is pivoted as far as possible to the lower recess 12, the flap 15 extends from the pivot point 14 as seen from preferably to the bottom 10 to inclined. In other words, the fastening element 8 usually has an upper side 16. The top 16 extends in the installed state of the ventilation element 8 usually horizontal. A distance d of the flap 15 from the upper side 16 is therefore greater, the farther from the side wall 11 is measured. Due to their inclination so the flap 15 forms in the open position with the horizontal angle β. The angle β can - be determined as needed - analogous to the angle α. For example, the angle β may be between 5 ° and 10 °.

In particular, in the case of the storage of the flap 15 via a film hinge, the film hinge may be formed as a foil, which is a separate component, which is manufactured separately from the flap 15 and the hollow box. In this case, the film hinge may be formed as a thin film. In particular, the film may be as thin as can not be achieved by injection molding. The film can in this case, for example, in a Spitzgießwerkzeug, by means of which the flap 15 is made to be inserted. Alternatively, the film may be glued to the flap 15, for example.

Preferably, furthermore, the underside 10 is inclined relative to the horizontal, in such a way that the bottom 10 in the region of the lower recess 12 has its lowest point. Due to the fact that the upper side 16 generally runs horizontally, an inner height h (ie the distance of the underside 10 from the upper side 16) in the region of the edge 9 is thus maximal. With increasing distance x from the side wall 11, the inner height h decreases strictly monotonously. It is possible that a wall thickness of the bottom 10 is uniform. If an inclination of the bottom 10 is realized in this case, seen from the outside, the bottom 10 is inclined. Alternatively, the wall thickness of the bottom 10 may vary. In this case, despite the variation in the internal height h, ie the inclination of the bottom 10 relative to the top 16, seen from the outside, a parallel course of the bottom 10 to the top 16 can be realized. Seen from the outside can therefore according to the representation in FIG. 4 the venting element 8 also have a rectangular cross-section in this case.

Preferably, the flap 15 is formed elastically at least in the region of its stop edge 17. The stop edge 17 is the portion of the flap 15, with which the flap 15 in the closed position - depending on the length l of the flap 15 to the side wall 11 or the top 16 of the hollow box 8 'abuts. Alternatively or in addition to the elastic formation of the stop edge 17, a stop region 18 of the hollow box 8 'can be designed to be elastic. The stop area 18 is the area of the hollow box in which the flap 15 rests against the hollow box in the closed position. In the case of storage of the flap 15 via a film as a film hinge, the film can be further dimensioned such that it forms the stop edge 17, so slightly (about 1 mm) beyond the flap 15 as such. In this case, the rattling noises are prevented by the film. Furthermore, the sealing effect is improved in this case.

Preferably, the ventilation element 8 further comprises spacers 19. By means of the spacers 19, a pivoting of the flap 15 is limited to the bottom 10, before the flap 15 rests on the bottom 10. This ensures that in the corresponding position of the flap 15 - in particular the open position - even at very low pressure differences already an air flow. Because the spacers 19 cause in this case that the flap 15 in the said position, the air duct does not close completely downwards. The spacers 19 may be arranged on the flap 15. Preferably, however, they are arranged on the housing of the venting element 8 as such. The spacers 19 may be formed, for example, as webs, edges or arranged on the bottom 10, upstanding pins or other constructions. As shown in FIG. 4 These are small, round, cone-like projections. To avoid rattling noises during the transition to the open position, the flap 15 and / or the spacers 19 are preferably elastic, at least in that region in which they touch in the open position of the flap 15. In an analogous manner, spacers can also be provided which limit the pivoting of the flap 15 before the flap 15 rests on the upper side 16. These spacers are not shown in the FIG. Like the spacers 19, they can be designed, for example, as webs, edges or pins arranged on the upper side 16 or other constructions. An embodiment as a small, round, pin-like projections is possible.

As already mentioned, the ventilation element 8 is usually attached to the top or the bottom of the window element 2. If the flap 15 is actuated by gravity, an arrangement on one of these two sides is absolutely necessary. If the flap 15 is acted upon by a restoring force (for example, by a spring element or by a corresponding configuration of a connecting element in the articulation point 14), the ventilation element However, 8 may alternatively be attached to the sides of the window element 2. Regardless of the location of attachment of the ventilation element 8 on the window element 2, however, the side wall 11 of the ventilation element 8 is always that side which bears against the seal 6. In an analogous manner, the underside 10 of the ventilation element 8 is always that side which has a common edge 9 with the side wall 11 and does not rest on the frame 3 or faces the window fold.

The flap 15 of the venting element 8 is at a first differential pressure between inside and outside of the closed position in the open position and at a second differential pressure between inside and outside of the open position in the closed position over. The first differential pressure is preferably less than the second differential pressure to effect a certain switching hysteresis. Preferably, the venting element 8 is designed such that the differential pressures are between 10 and 70 Pa, in particular between 15 and 50 Pa.

It is furthermore particularly preferred to supplement the embodiments explained above by forcing a transverse flow of the air flowing through the hollow box within the hollow box, ie a flow of the air in the direction of the pivot axis about which the flap 15 is pivotable. The cross-flow of the air results in a significantly improved sound insulation. When the hollow box extends in the direction of the pivot axis over a total length L, it is, for example, as shown in FIG FIG. 5 possible that the lower opening 12 extends from the one end of the hollow box over a first partial length L1 and the upper opening 13 extends from the other end of the hollow box over a second partial length L2 and further the sum of the two partial lengths L1 , L2 is at most as large as the total length L, preferably even smaller than the total length L. Alternatively or additionally, in the hollow box Be arranged air guide or baffles, which force a deflection of the air flow.

In many cases, it will still be sufficient to use per window element 2, a single venting element 8 having a single hollow box. However, it is not excluded that the ventilation element 8 has a plurality of hollow boxes. In this case, the hollow boxes are arranged in the direction of the edge 9 arranged one behind the other. They are separated by orthogonal to the edge 9 extending partitions. The bottom 10, the side wall 11 and the edge 9 and the top 16 are components of the ventilation element 8 as a whole, so uniform for all hollow boxes. The lower recess 12, the upper recess 13, the pivot point 14, the flap 15 and the associated stop edge 17, stop areas 18 and spacers 19 are provided individually for the respective hollow box. Alternatively or in addition to the use of a ventilation element 8 with a plurality of hollow boxes, it is also possible to use a plurality of ventilation elements 8.

If there are several hollow boxes - be it in a single ventilating element 8 or in several ventilating elements 8 - it is furthermore possible for the hollow boxes to be of the same design. Alternatively, it is possible for the hollow boxes to be designed such that they have different first and / or second differential pressures from each other. It can thereby be achieved that the various hollow boxes open or close successively, so that a multiple stepped switching action is given.

The present invention has many advantages. In particular, the ventilation element 8 is not arranged in the fitting level. It can therefore not come to a conflict with other arranged in the fog level elements of the window element 2. Furthermore, the ventilation element 8 not visible in the closed state of the window member 2, because it is disposed within the Fensterfalzes. The use of the flap 15 itself as a chicane, which enforces the zigzag path of the air flow, simplifies the design and construction of the ventilation element 8. It is (with the same space) a higher volume flow than in the prior art achievable. The reason for this is that the volume flow limiting element narrows the flow area to a much lesser extent than in the prior art. Also, the structure of the venting element 8 is simpler.

The above description is only for explanation of the present invention. The scope of the present invention, however, is intended to be determined solely by the appended claims.

LIST OF REFERENCE NUMBERS

1

facade

2

window element

3

frame

4

casement

5

shiplap

6

poetry

7

section

8th

ventilation element

9

edge

10

bottom

11

Side wall

12

lower recess

13

upper recess

14

articulation

15

flap

16

top

17

stop edge

18

stop area

19

spacer

ao, au, d

distances

H

interior height

L

overall length

L1, L2

part lengths

1

length

α, β

angle

Claims (11)

1. Ventilating element (8) for installation in a window element (2),

   - wherein the ventilating element comprises a number of hollow boxes,

   - wherein the respective hollow box has a respective lower recess (12) at a lower side (10) of the ventilating element in the vicinity of a horizontally extending edge (9) of the ventilating element and has a respective upper recess (13) at a side wall (11), which adjoins this horizontally extending edge (9), of the hollow box,

   - wherein a respective flap (15) is pivotably mounted in the interior of the respective hollow box at a respective articulation point (14) so that the respective flap (15) is removable between a respective open setting and a respective closed setting,

   - wherein the respective articulation point (14) is disposed in the region which is between the respective lower and the respective upper recess (12, 13) and which includes this horizontally extending edge (9), and

   - wherein a respective length (I) of the respective flap (15) is not only larger than a respective lower spacing (au) of the respective articulation point (14) from the edge, which is furthest from the respective articulation point (14), of the respective lower recess (12), but also larger than a respective upper spacing (ao) of the respective articulation point (14) from the edge, which is furthest from the respective articulation point (14), of the respective upper recess (13) so that the respective flap (15) forces air flowing into the respective hollow box by way of the respective lower or upper recess (12, 13) to be deflected in zigzag manner before it can flow out of the respective hollow box by way of the respective upper or lower recess (13, 12).
2. Ventilating element according to claim 1, characterised in that the respective flap (15) is mounted on the respective hollow box by way of respective bearing elements or a respective film hinge, which with respect to pivotation of the respective flap (15) relative to the respective hollow box opposes no force returning the respective flap (15) to a respective predetermined rest position.
3. Ventilating element according to claim 2, characterised in that the respective flap (15) when it is pivoted as far as possible towards the respective lower and/or upper recess (12, 13) forms together with the side wall (11) a respective angle (α) different from 0° so that the respective flap (15) in the absence of an air flow moves away, due to its gravitational force, from the side wall (11).
4. Ventilating element according to claim 1, characterised in that the respective flap (15) is connected with the respective hollow box by way of a respective connecting element so that pivotation of the respective flap (15) relative to the respective hollow box produces a resilient deformation of the respective connecting element.
5. Ventilating element according to any one of the preceding claims, characterised in that the respective flap (15) when it is pivoted as far as possible towards the respective lower recess (12) extends at an inclination with respect to the lower side (10) as seen from the respective articulation point (14).
6. Ventilating element according to any one of the preceding claims, characterised in that the ventilating element has an upper side (16), that a respective internal height (h) of the respective hollow box is at a maximum in the region of the horizontally extending edge (9) and that the respective internal height (h) decreases strictly monotonically with increasing spacing from the side wall (11).
7. Ventilating element according to any one of the preceding claims, characterised in that the respective flap (15) is of resilient construction at least in the region of its respective abutment edge (17) remote from the respective articulation point (14) and/or that a respective abutment region (18) of the respective hollow box, in which the respective flap (15) bears in the respective closed setting against the respective hollow box (8'), is of resilient construction.
8. Ventilating element according to any one of the preceding claims, characterised in that respective spacers (19) are present, by means of which pivotation of the respective flap (15) towards the lower side (10) is limited before the respective flap (15) rests on the lower side.
9. Window element

   - wherein the window element has an aperture frame (3) by means of which the window element is securable in walling of a building,

   - wherein the window element has a casement frame (4) secured to the aperture frame (3),

   - wherein the aperture frame (3) or the casement frame (4) has step fold (5) against which when the window element is closed a seal arranged in the respective other frame (4, 3) bears,

   - wherein the step fold (5) has, in a section (7), a fold recess in which is arranged as a substitute for the step fold (5) a ventilating element (8) according to any one of the preceding claims and

   - wherein the horizontally extending edge (9) of the ventilating element (8) does not adjoin the frame (3, 4) having the step fold (5).
10. Window element according to claim 9, characterised in that the ventilating element (8) is constructed in accordance with claim 3 and is arranged at an upper side or a lower side of the window element.
11. Window element according to claim 9 or 10, characterised in that the lower side (10) extends at an inclination relative to the horizontal so that the lower side (10) has its deepest point in the region of the respective lower recess (12).

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